Emergency signal balloon



FIG. 1 is a front view of the emergency signal balloon.

FIG. 2 is a back view of the claimed design.

FIG. 3 is a side view of the claimed design.

FIG. 4 is a top view of the claimed design; and,

FIG. 5 is a bottom view of the claimed design. 

CLAIM I claim the ornamental design for an emergency signal balloon, as shown and described. 